The people I work with have started to call it "Mini-Me"I love the huge autocascade in the background. "Say hello to my little friend".
The people I work with have started to call it "Mini-Me"I love the huge autocascade in the background. "Say hello to my little friend".
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
Lol cute, you should officialy name it that after it is finalized lol!Originally Posted by mytekcontrols
The people I work with have started to call it "Mini-Me"
Bring back natural selection! No more warning lables!
The one and Only MG Pony
rofl, -100c @ 3600w for the big brother. What is that going to be used for?
Nice work.
polizei:
the large one is a gas chiller
To condense a gas into liquid?
Actually the large one is not a gas chiller, but a direct expansion autocascade just like it's little brother. It is used mainly for what is called cryo-pumping of water vapor in Vacuum Coating Systems. These would be systems used for making CD's, DVD's, Optical coatings on eye glasses, ect.
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
amazing work. Hope ypu dont leave us....
regards
Q9550 EO @ 4.1
Asus P5Q Deluxe
4 Gb DDR2 Gskill
2xVelociraptors 300 gb Raid 0
Sapphire Vapor 4870 1Gb
PCP&C 750w silencer psu
Thanks Marvinamazing work. Hope you dont leave us....
Here are some photos I took after trimming the excess foam, punched a hole through the top of sheet metal enclosure, installed a strain relief, fed the line thru it, and seated it in place.
This is a test fit, since I still need to seal the cut foam, and finish some odds and ends. However I am pleased with the results thus far. With a nice front panel, I think this thing will look pretty sweet
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
Compact!
Nice work!
You have the neatest work here, without a doubt, somoene needs to give you a damn award.
If you have a cooling question or concern feel free to contact me.
that is simply amazing hey, well done
WHat size compressors are used in each unit??
Thank's AdamYou have the neatest work here, without a doubt, somoene needs to give you a damn award.
I believe it's 1/2 hp, although the LG literature isn't very clear about this. Displacement is 9cc/per revolution.WHat size compressors are used in each unit??
I know it seems small, but with 2 HC's as part the charge (R-600, R-170), and based on some other tests I made with R-600, I think it'll do pretty good at -100C. R-600 has a fantastic COP, much better then an equivalent CFC, HCFC, or HFC in the same boiling temperature range. I've seen as much as a 20% improvement in load handling.
Edit: Initial charge will use R-600, R-170, and R-14
Last edited by mytekcontrols; 03-25-2008 at 05:15 AM.
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
Really? I thought with what 3 phase seps you'd be using a mid carrier. Definitly want to see its abilities. Had a small question and possible favor, do you think its possible for you (more mainly the group/company) you work with, to get a small amount of ethylene to try? You might find it a cheaper swap for r14 for many applications, and again have better abilities.
Gotta love butane though.
If you have a cooling question or concern feel free to contact me.
Michael, this unit is so awesome! The work is clean, everything fits together so perfect, I love it in the original case
(I am coming her to XS to look if there is a progress with your project every day)
Thats two part liquid polyurethane right? What density?
If you have a cooling question or concern feel free to contact me.
I think I covered this beforeReally? I thought with what 3 phase seps you'd be using a mid carrier. Definitly want to see its abilities.But my mind might be a bit frazzled. Phase separation is not perfect, it isn't likely that all of the R-600 will separate out at the 1st, or that R-170 the 2nd, or all of the R-14 at the 3rd. So having an extra stage will help purify the mix down to the lowest boiling component. Of course I do make a sacrifice in terms of heat load capacity, but I will achieve a colder temperature with the mixture I have chosen. Also the not so perfect phase separation tends to keep the number of different refrigerants required to a minimum, since we end up with pseudo boiling point refrigerants (mixtures) in between the actual pure refrigerants being utilized. This also helps to cover the gaps between said refrigerants.
And last, but not least, I might also like to add a bit of either R-50 or Argon to get things a little colder still, and this is really where the extra stage will pay off.
Since our plan is to eventually get away from flammable gases in our charges, this is not a probability. But things change, so who knows perhaps someday I might have some to work with.Had a small question and possible favor, do you think its possible for you (more mainly the group/company) you work with, to get a small amount of ethylene to try?
Yes I doGotta love butane though.
Thanks godmod, I appreciate your thoughtsMichael, this unit is so awesome! The work is clean, everything fits together so perfect, I love it in the original case
Yes it is a 2 part foam from InstaPak (MilSpec spray-in type). I'm not sure what the density is though, never really thought about it to tell the truth.Thats two part liquid polyurethane right? What density?
Last edited by mytekcontrols; 03-27-2008 at 04:37 AM.
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
Here's a look at the test set-up, and results obtained in this first run over the weekend.
I will give more details over the next day or so
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
Is that -102.6c? Nicely done.
If you ran it deeper into a vacuum, could you get temps lower at that load? I guess I'm just used to seeing single digit pressures suction side in single stages, 43psi might be normal for an autocascade?
I do not post in here a lot, but I just have to say:
Michael, that unit is absolutely stunning, I love your attention to detail.
Bravo
Wow! But your target was more load with this temp, wasn't it?
Good luck for tuning
Awesome unit.
Regards
Woohoo! Nicely done, all out of a single compressor
That's about normal for an autocascade. Super low compression ratioIs that -102.6c? Nicely done.
If you ran it deeper into a vacuum, could you get temps lower at that load? I guess I'm just used to seeing single digit pressures suction side in single stages, 43psi might be normal for an autocascade?
Yes I could, but only if I went with a larger displacement compressor than what I am using. making the captubes of a smaller flowrate would also yield a lower evaporator pressure, but I would lose out on heat load capacity at the same time.
Unlike a standard cascade, it is the nature of an autocascade to run positive suction pressures.
Yes, I was hoping to get 200 watts, but physics have stepped in, and limited me to maybe 150 watts at this temp (need a bigger compressor).
Here was my previous estimate:
But I did put in the qualifier at the end, which would put me at -100C under a 150 watt heat load
And of course to be fair, I do have at least 50 watts of static losses in the line and coil insulation. If better methods of insulating were employed, these losses could be minimized.
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
Yes I got some stack temps, but not all.
Here are the specs:
Cool-No-Load Tuned for maximum of 100 watts
- Compressor Pressures: 20/125
- Compressor Discharge: 42.6C
- Compressor Suction: -8.6C
- Strainer#1: -62.6C
- Strainer#2: -77.6C
- Strainer#3: -86.1C
- Strainer#4: -103.2
- Coil Outlet: -115.4C
- Coil Inlet: -116.9C
- Compressor Amperage: 2.2
125 Watts Applied Heat Load
- Compressor Pressures: 43/240
- Compressor Discharge: 51.8C
- Compressor Suction: -2.6C
- Strainer#1: -42.4C
- Strainer#2: -61.2C
- Strainer#3: -67.2C
- Strainer#4: -96.1C
- Coil Outlet: -99.8C
- Coil Inlet: -103.8C
- Compressor Amperage: 3.6
Charge: 7oz of R-600, R-170, R-14 (60%/40% ratio)
The Loaded temps were after adding more R-170 and R-14, in order to take on the extra load. As you can see by looking at the relationship between the final strainer (#4) and the coil outlet; I am nearly flooded.
I would give more specifics on the gas charge, but I had to make so many additions because of inadequate expansion tank volume, that it would be difficult to come up with accurate amounts at this time. I will be increasing my expansion tank size, and recharging from scratch (more test results to come).
It is certainly impressive considering that this is being done with a single 9cc displacement compressor, and drawing just under 4 amps to boot!
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
Very impressive indeed!
But why the need for a bigger expansiontank? Having high static pressure?
And the temp at the first strainer is really low! Even loaded! Never expected to see that...
And one other thing I noticed... about your HX, you're condensing upwards in your HX. Doesn't seem logical to me
Last edited by Jack; 03-31-2008 at 10:50 AM.
I have been inspiredSo it looks like you have a healthy supply of R14 going into the evaporator. When you do your tests would it be possible to load it up to 200-300w? I imagine the temps will drop considerably but would it stabilize with more R-170 mixing into the higher stages?
Posting Permissions
Reply With Quote
Bookmarks